automata v0.1.0 Automaton.Types.BT.Composite.Sequence

Behavior for user-defined sequence actions. When the execution of a sequence node starts, then the node’s children are executed in succession from left to right, returning to its parent a status failure (or running) as soon as a child that returns failure (or running) is found. It returns success only when all the children return success. The purpose of the sequence node is to carry out the tasks that are defined by a strict sequence of sub-tasks, in which all have to succeed.

Most BT implementations also include a Sequence with memory, where a subtree that returned Succeed is never executed again.

A Sequence will return immediately with a failure status code when one of its children fails. As long as its children are succeeding, it will keep going. If it runs out of children, it will return in success.